A cryogenically-cooled wide-band HEMT MMIC low-noise amplifier

1 February 1992

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Microwave and Guided Wave Letters

Vol. 2 (2) , 58-60
https://doi.org/10.1109/75.122409

Abstract

A balanced single-stage wideband HEMT MMIC low-noise amplifier (LNA) was designed, fabricated, cooled to a temperature of 19 K, and evaluated from 8-18 GHz. The MMIC LNA performed without damage at all test temperatures. The amplifier gain flatness over the 8-18-GHz frequency band was maintained at both room and cryogenic temperature, indicating that the broadband design topology is relatively insensitive to operation temperature. Gain increased an average of 2 dB, while the noise temperature exhibited as much as an eightfold reduction from 160 K to 20 K at 19 K operation temperature. This is the first result on performance of a cryogenically cooled HEMT MMIC LNA.

Keywords

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